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==Service and preservationBR Class 31==The BR Class 31 diesel -electric locomotive was also known originally classified as the Brush Type 2 and originally as the Class 30. A total of 263 were built by Brush Traction between 1957 and 1962as part of BR's early modernisation plans to replace steam locomotives.<ref name=Wikipedia>[https://en.wikipedia.org/wiki/British_Rail_Class_31 BR Class 31 on Wikipedia]</ref> This locomotive was originally The Type were built with Mirrlees JVS12T engines as a Class 30 and entered service used in June 1959 at Norwich Thorpe MPD numbered '''D5533'''. In April 1968 it was reclassified locomotives built for the then Ceylon Government Railways, but uprated from Class 30 1,250hp to Class 31 sub-type 31/1 (,365hp. This, however, proved unreliable and the standard locomotive fitted Type was rebuilt with steam heating and Blue Star electro-pneumatic control)the proven English Electric 12CSVT found in the Class 37.<ref name=BRDatabase>[https://www.brdatabase.info/locoqry.php?action=locodata&type=D&id=5533&loco=5533 BRDatabase - 31466]</ref>
The introduction of [[TOPS codes|TOPS]] saw the locomotive renumbered type designated as '''31115''' in January 1973. In March 1985 it was fitted with ETHClass 30, becoming suband when re-type engined as Class 31/4 and receiving its final number of '''31466'''.<ref name=BRDatabase/>
The introduction of TOPS saw the locomotive renumbered as '''31115''' in January 1973. In March 1985 it was fitted with Electric Train Heating ('ETH'), becoming sub-type 31/4 and receiving its final number of '''31466'''.<ref name=BRDatabase/> The ETH was sufficient to power eleven Mk3 carriages, the type 31s often being used to pre-heat a train in a depot before a more modern and powerful locomotive would carry out the day's inter-city duties.
By May 1988 the locomotive had served in BR's Eastern Region for all but a year. It was then transferred to Crewe Diesel, where it remained for a number of years.<ref name=BRDatabase/> Prior to the introduction of the Class 66, English Welsh & Scottish (EWS) took control of the Class 31s from the Mainline Freight and Trainload Freight companies. 31466 was repainted into EWS livery for the Toton TMD open day in May 1998; Wikipedia suggests it was then the only one of the class to be in traffic running in the EWS colours.<ref name=Wikipedia/>
==Preservation==
31466's last duties were at Old Oak Common where it was used for small shunt moves and carriage heating. After being withdrawn from service in February 2001 it stored there until being acquired from EWS by the Dean Forest Diesel Association (DFDA), arriving at Lydney on the Dean Forest Railway by low loader on 14 March 2007. After a number of small defects were addressed it operated its first service train in October of that year. It was repainted in EWS livery in 2009 and attended a gala at the Worth Valley Railway in 2012.<ref>[http://www.dfda.co.uk Dean Forest Diesel Association] (retrieved 2 August 2021)</ref>
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31466 leaving for Gloucester from the Dean Forest Railway.JPG|31466 in 2012 (Wikimedia Commons)
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31466 had remained resident on the Dean Forest Railway since.<ref>[https://deanforestrailway.co.uk/diesel-locomotives/ Dean Forest Railway, Diesel Locomotives page]</ref> Its 1470 hp English Electric twelve-cylinder diesel engine, which powers the generator supplying the DC motors on four out of the six axles ([[UIC classification|UIC classification A1A-A1A]]), has remained in working order throughout. A three year overhaul was completed by the DFDA in November 2020, which involved replacing entire sections of rotten or corroded cab with fresh metal or timber, renewing window surrounds and wiring, as well as re-painting in the EWS colours<ref>[https://www.punchline-gloucester.com/articles/aanews/restored-locomotive-emerges-from-lydney-workshop Punchline Gloucester]</ref>.
On 9 July 2021 31466 was collected from the DFR by [[50049|50049 Defiance]] and delivered to the SVR as cover for [[BR Class 33 33108]]. While at the SVR it carried out various P-Way duties as well as working some passenger trains. It left in June 2023, collected by 20142 and 20189 and moved to the North Yorkshire Moors Railway. In July 2023 it was reported on social media that the locomotive had been bought by Peter Best and would be based at the NYMR in future<ref>[https://www.national-preservation.com/threads/31466-change-of-ownership.1422567/ National Preservation Forum] (retrieved 3 July 2023)</ref>.
==See also==
*[[Diesel Locomotives hired by the SVR]]
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